Outstanding performance of capacitive deionization by a hierarchically porous 3D architectural graphene

Wahid Dianbudiyanto, Shou Heng Liu

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

To attain the optimal capacitive deionization (CDI) performance for brackish water desalination, an electrode should possess high electrical conductivity, large surface area, hierarchically porous carbons with three-dimensional (3D) interconnection which can provide efficient pathways for ion and electron transfer. Herein we demonstrate a novel route to prepare a hierarchically porous 3D architectural graphene by using a combination of microwave treatment and H2O2-assisted hydrothermal method. The physicochemical and electrochemical properties of prepared 3D porous graphene are identified by scanning/transmission electron microscopy, X-ray based spectroscopies, Raman, nitrogen adsorption-desorption, cyclic voltammetry and electrochemical impendence spectroscopy. The desalination tests are carried out by using a batch-mode CDI at 1.4 V in a 500 ppm NaCl solution. Experimental results show that 3D porous graphene has a superior specific capacitance (190 F g1) and ultrahigh electrosorption capacity (21.58 mg g1). This unique hierarchically porous 3D graphene which exhibits good electrical conductivity, efficient ion transport and lower charge transfer resistance could be one of promising electrodes for CDI in the practical applications.

原文English
文章編號114069
期刊Desalination
468
DOIs
出版狀態Published - 2019 十月 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

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